| abstract |
1336281 Activated clays; purifying water CREUSOT LOIRE 28 Feb 1972 [1 March 1971] 9100/72 Headings C1A and C1C] [Also in Division B1] Kaolinite, bentonite, montmorillonite, crushed brick, glass beads or crushed glass, resins in hydroxide form and wood sawdust are activated with a halogenating agent before binding on to the activated substrate an amine or a protein. Specified halogenating agents are cyanuryl halides, cyanogen halides, thionyl halides and sulphuryl halides. The materials are useful in the treatment of waters containing organic pollutants such as hydrocarbons. |